Northwest Asthma & Allergy Center, as it is known today, began as an allergy specialty clinic in 1964 under the direction of C. Warren Bierman, MD, and William E. Pierson, MD. The practice has grown steadily since that time, undergoing several physical changes as well as the addition of partners, staff, and a name change. The physicians are:

	Gail G. Shapiro, MD	1974
	Clifton T. Furukawa, MD	1977
	Leonard C. Altman, MD	1984
	Frank S. Virant, MD	1988
	Paul V. Williams, MD	1991
	Michael S. Kennedy, MD	1993
	Jonathan W. Becker, MD	1995
	Mary V. Lasley, MD	1998
	Michael E. Weiss, MD	2000
	Stephen A. Tilles, MD	2000
	Ashley Jerath Tatum, MD	2001
	Nola Jean Attaway, MD	2002
	John C. Walker, MD	2003
	Jay D. Sprenger, MD	2005
	Thao N. Tran, MD	2007
	David R. Naimi, DO	2008
Audrey Y. Park, MD	2009

Originally the focus for care was pediatric and adolescent patients; however, the focus was expanded to include patients of all ages in 1984. To manage physical growth of the practice, offices were opened in Mount Vernon in 1991, Richland in 1995, Everett and Yakima in 1997, and Redmond in 2000. There are now full time offices in Renton, Issaquah, and Redmond Ridge.

The physicians are specialists who have been certified by the American Board of Allergy & Immunology. In addition, they are trained in pediatrics or internal medicine, and are certified by the American Board of Pediatrics or American Board of Internal Medicine. The physicians are members of the clinical faculty of the University of Washington School of Medicine, and its affiliated hospitals.